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Extraction method of red cabbage pigment

An extraction method and technology for purple cabbage, applied in chemical instruments and methods, azo dyes, organic dyes, etc., can solve the problems of low pigment purity, and achieve the effects of high color value, improved biological activity, and improved color value

Inactive Publication Date: 2010-07-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, purple cabbage pigments at home and abroad are limited to extraction with organic solvents, and the purity of the pigments is low.

Method used

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  • Extraction method of red cabbage pigment
  • Extraction method of red cabbage pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: 1) After cleaning the silt, removing the roots, removing the pests and defective leaves, the mature purple cabbage is chopped, and the chopped purple cabbage is mixed with water in a mass ratio of 1:5 and placed in a beater Beat into a slurry, the slurry is coarsely filtered with a vibrating sieve and the filtrate is collected, and the pH value of the filtrate is adjusted to 3.0 with 6mol / L HCl;

[0026] 2) Add compound pectinase to the filtrate at a ratio of 100g purple cabbage: 0.002ml at 50°C, enzymolyze at 45°C for 60 minutes and clarify, centrifuge the filtrate after enzymolysis and clarification at 4000 rpm for 20 minutes, centrifuge The resulting supernatant is the pigment clear liquid;

[0027] 3) Put the pigment clear liquid on the LSA-21 macroporous adsorption resin column for pigment adsorption. The flow rate of the pigment clear liquid on the column is 1.0 times the column volume / hour, and the temperature on the column is 40°C. Desorb the pigment...

Embodiment 2

[0028] Example 2: 1) After washing the silt, removing the roots, removing the pests and defective leaves, the mature purple cabbage is chopped, and the chopped purple cabbage is mixed with water in a mass ratio of 1:5 and placed in a beater Beat into a slurry, the slurry is coarsely filtered with a vibrating sieve and the filtrate is collected, and the pH value of the filtrate is adjusted to 3.5 by using 6mol / L of HCl;

[0029] 2) Add compound pectinase to the filtrate at a ratio of 100g purple cabbage: 0.002ml at 45°C, enzymolyze at 50°C for 60 minutes and clarify, centrifuge the filtrate after enzymolysis and clarification at 4000 rpm for 20 minutes, and centrifuge The resulting supernatant is the pigment clear liquid;

[0030] 3) Put the pigment clear liquid on the LSA-21 macroporous adsorption resin column for pigment adsorption. The flow rate of the pigment clear liquid on the column is 1.0 times the column volume / hour, and the temperature on the column is 20°C. Desorb t...

Embodiment 3

[0031] Embodiment 3: 1) After cleaning the silt, removing the roots, removing the pests and defective leaves, the mature purple cabbage is chopped, and the chopped purple cabbage is mixed with water in a mass ratio of 1:5 and placed in a beater Beat into a slurry, the slurry is coarsely filtered with a vibrating sieve and the filtrate is collected, and the pH value of the filtrate is adjusted to 4.0 by using 6mol / L of HCl;

[0032] 2) Add compound pectinase to the filtrate at a ratio of 100g purple cabbage: 0.003ml at 45°C, enzymolyze at 48°C for 60 minutes and clarify, centrifuge the filtrate after enzymolysis and clarification at 4000 rpm for 20 minutes, and centrifuge The resulting supernatant is the pigment clear liquid;

[0033] 3) Put the pigment clear liquid on the LSA-21 macroporous adsorption resin column for pigment adsorption. The flow rate of the pigment clear liquid on the column is 1.0 times the column volume / hour, and the temperature on the column is 50°C. Deso...

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Abstract

The invention relates to an extraction method of red cabbage pigment. Extracting the red cabbage pigment with the red cabbage as a raw material and water as a solvent; treating the pigment liquid with composite pectinase, improving the clarity and the purity of the extracted pigment liquid, determining the optimum additive amount of the composite pectinase, the enzymolysis time, the enzymolysis temperature and the enzymolysis pH; adopting the molecular sieve technology to concentrate and purify the red cabbage pigment further, selecting the optimum macro-porous absorption resin, the optimum absorption temperature and the flow rate, and determining the concentration of the eluent and the de-absorption flow rate; and the red cabbage pigment extracted by the process of the invention not only has high color value and stable color number, but also improves the biological activity of the red cabbage pigment. In addition, the process provides a new method for extraction of the natural pigment by utilizing the red cabbage.

Description

technical field [0001] The invention relates to a pigment separation and purification method, in particular to a purple cabbage pigment extraction method using water as a solvent. Background technique [0002] In recent years, medical toxicology studies have found that chemically synthesized pigments used in food and beverages are toxic to varying degrees, and some even have teratogenic and carcinogenic effects. With the development of science and technology, the improvement of people's living standards and the increasing awareness of health, many synthetic pigments are gradually replaced by natural plant pigments. Plant-derived pigments are important natural functional food additives, which are widely used in industries such as beverages, candies, cakes, wines and snack foods, and can also be used in the production of special foods such as medical care products and children's food. The research and development of natural plant pigments is in the ascendant, and the separati...

Claims

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Application Information

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IPC IPC(8): C09B61/00C09B67/54
Inventor 易建华朱振宝李静娟吴园芳
Owner SHAANXI UNIV OF SCI & TECH
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